== sanity test 101b: check stride-io mode read-ahead =========================================================================== 19:08:31 (1786748911)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

1.926980s, 4.35324MB/s
Read-ahead success for size 8192

2.709967s, 3.09547MB/s
Read-ahead success for size 16384

2.210184s, 3.79543MB/s
Read-ahead success for size 32768

1.741752s, 4.81619MB/s
Read-ahead success for size 65536

1.436497s, 5.83963MB/s
Read-ahead success for size 131072

1.084826s, 7.73268MB/s
Read-ahead success for size 262144

1.162504s, 7.21598MB/s
Read-ahead success for size 524288

1.234100s, 6.79735MB/s
Read-ahead success for size 1048576